When you heat olive oil at high temperatures for a long time, it makes more of two harmful chemicals—HNE and ONE—than the other oils, because olive oil is mostly made of oleic acid.

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Evidence from Studies

Supporting (1)

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Comparison of Furans Formation and Volatile Aldehydes Profiles of Four Different Vegetable Oils During Thermal Oxidation.

Cross-Sectional Study

In Vitro

2019 Jul

The study heated olive oil and other oils the same way the claim says, and found that olive oil made more of these harmful chemicals than the others — because it’s high in oleic acid, just like the claim said.

Contradicting (0)

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Comparison of Furans Formation and Volatile Aldehydes Profiles of Four Different Vegetable Oils During Thermal Oxidation.

Score: 4

DOI: 10.1111/1750-3841.14659

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